﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Bridge
{
    class DR1
    {
        public string draw_a_line()
        {
            string str = "调用第一种画矩形方法";
            return str;
        }
        public string draw_a_circle()
        {
            string str = "调用第一种画圆方法";
            return str;
        }
    }
}
